Trimming mechanism for sewing-machines.



Patented May 2|, 190i. 6. H. 'DIMOND &. W. F. DIAL. v TBIMMING MECHANISM FOR SEWING MACHINES.

(Application filed Jan. 22, 1900.)

(In llodol.)

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GEORGE H. DIMOND AND WILBUR F. DIAL, OF BRIDGEPORT, CONNECTICUT, ASSIGNORS 'lO WHEELER & WILSON MANUFACTURING COMPANY, OF SAME PLACE.

TRIMMING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION formingpart of Letters Patent No. 674,605, dated May 21, 1901. Application filed January 22, 1900. Serial No. 2,249. (No model.)

' T and whom it may concern.- Figure 1 of the drawings represents a suffi- Be it known that we, GEORGE H. DIMOND cient portion of a well-known form of sewingand WILBUR F. DIAL, citizens of the United machine with our improvements added to en- States, residing at Bridgeport, county of Fairable our invention to be understood. Fig. 2

field, State of Connecticut, have invented an is a section in .the line at of Fig. 1. Fig. 3 55 Improvement in Trimming Mechanism for shows the slotted feed-plate in perspective Sewing-Machines, of which the following deand detached, and Fig. 4 shows the novel scription, in connection with the accompanyunder or stationary cutter-blade cooperating ing drawings, is aspecification, like reference with the usual reciprocating trimmer-blade.

characters on the drawings representing like It will be supposed that the arm A is tubu- 60 parts. lar and that it contains a suitable shaft, as A,

This invention relates to the production of having at its front end a suitable pinion, as a novel trimming mechanism more especially A to engage a pinion A on the lower end of adapted for use in trimming the edges of a shaft which in its rotation movesasuilable stitched material during the stitching opershuttle or loop-taker (not shown) that the 65 ation, our invention enabling close and accupoint thereof may enter the loop of needlerate trimming to be done and enabling the thread presented by an eye-pointed needle I), operator to Witness the trimming operation carried in usual manner by a needle-bar, as B, and see that it is done accurately. duly reciprocated in the head 13 of the usual Our improvements are represented as emoverhanging arm of the sewing-machine. 7o bodied in connection with a sewing-machine The parts so far described are and may be in which the work is supported upon atubu- 'of any usual construction common to sewinglar arm containing, it will be supposed, any machines, the particular machine herein illususual shuttle or equivalent device completrated being one of the well-known Wheeler mental to the usual needle of a stitch-form-' & Wilson type of tubular-arm machine. ing mechanism, said tubular arm, or it may The overhanging arm besides containing be any usual fiat work-support, being cut the usual needle-barBalsocontainsapresseraway or recessed to form a chamber at the bar C and a cutter-bar D. right-hand side, the operator facing the ma- The parts so far specifically described are 0 chine, of the slotted plate through which the and may be of usual construction, and in feeding device operates to engage and feed place thereof we may employ any other usual the material, said chamber receiving at one or suitable equivalents. end a stationary cutter-blade, with which 00- The exposed free end of the tubular arm operates any usual trimmer-blade, the cutter- A is in practice covered by a suitable shield 5 blade occupying a stationary position at the E, of usual shape, it being represented as fitright-hand side of the usual feeding device, "ting the curved outline of the arm A, the said said blade entering, preferably, a notch in one shield being partially broken out in Fig. 1 side of the slotted plate referred to, through to show the gearing for actuating the usual which the points of the feeding device pass shuttle or loop-taker.

40 to engage the material to be fed. The upper In practice the shaft A will be rotated and or movable trimmer-blade is carried by a bar the needle-bar and cutter-bar will be reciproactuated in usual manner from a shaft in the cated in usual manner common to trimming usual overhanging arm of the machine. The attachments for use in sewing-machines, and chamber in the upper side of the arm or workthe feeding device d composed of a series 45 support leaves an open space at the rightof teeth carried by a block, may be also of 5 hand side of said slotted plate in which may usual construction-for instance, the confallthe waste removed from the stitched matestruction common to the Wheeler 85 Wilson rial, the descent of the waste from the trimmed sewing-machine in market. edge of the material leaving that edge ex- Referring to Figs. 1 and 2, a represents a 50 posed to be readily -seen by the operator. slotted plate having (see Fig. 5) a series of ioo slots, through which may work the feeding device d said plate being attached to the arm A by suitable set-screws, as a. The slotted plate Ct is provided at its inner or right-hand side viewing Figs. 1 and 2 with a notch a to receive and maintain in its proper position in alinement with the direction of feed of the material the stationary but adjustable cutter-blade c, which supports the work and cooperates with the edge d of the trim mer-blade D, the said cutter-blade having a foot 0', which in the present instance of our invention has a slot 0 for the reception of a set-screw c to thereby confine the said cutter-blade in its adjusted position, said setscrew entering a suitable block 0%, sustained within the arm A, the working part of said cutter-blade entering the notch a of said plate and forming an end for said chamber, to be described. The trim mer-blade D is slotted at its upper end to receive one ormore set-screws, as D by which to confine the blade in any desired position vertically upon a block D the upper end of which is provided with a horizontal slot 8, (see Fig. 2,) which fits over a horizontal spline 9, carried by the cutterbar D, the upper end of said block receiving through a slot therein an adjusting-screw D, said block and the cutter D carried by it being capable of being adjusted horizontally or when the screw D is loosened to thereby place the cutting edge d of the trimmer-blade more or less distant from the vertical plane in which the needle B reciprocates, said trimmer-blade and cutter-blade being adjustable, whenever desired to occupy operative positions more or less distant from the line of action of the needle, to provide for leaving a wider or narrower margin, as may be desired, between the trimmed edge of the material and the seam uniting the different layers of material. The upper side of this arm A, or it might be a flat work-support, is cut away to leave a chamber e at one side of the line of trimming, herein represented as the inner side, said recess receiving the foot of the cutterblade 0, the recess being deep enough to expose the lower end and cutting edge of the blade D it descending at the right-hand side (see Fig, 1) of the cutter-blade c, the waste removed from the material in the operation of trimming falling into said chamber, leaving the trimmed edge of the material exposed to the view of the operator.

To prevent the work from contact with the moving or operating parts of the sewing-machine, the chamber 6 is provided with a cover or shield f, represented as depressed or concaved centrally and as supported at its opposite ends on a portion of the arm A or worksupport, the curved ends of said shield when the latter has been applied in place, as represented in Fig. 2, being confined in position by suitable gibs f which are held in place by suitable set-screws f The resser-foot 9, connected to the presserbar by a suitable screw, is bifurcated or split at its end in usual manner to form two toes g and g, the right-hand toe (see Figs. 1 and 2) being upturned to expose the work being trimmed substantially up to the line of action of the edge 61 of the blade D.

In using the machine herein described it will be supposed that the work will be inserted under the presser-foot from its left-hand side viewing Fig. 1 and that the portion of the material to be trimmed off will project beyond the right-hand side of the cutter-blade c, and inasmuch as some of this trimming is made on sharp angles or curved lines and the trimming has to be accurate the operator by having the line of trimming and stitching thoroughly in view mayby the left hand on the work at the left-hand side of the presserfoot accurately position the material preparatory to feeding it, so that the edge d of the blade D will cut the material exactly in the desired line.

We have herein shown the plate a as notched at its side to receive the stationary cutterblade 0, said blade entering said notch and being maintained by the plate in proper alinement with the edge of the trimmer-blade D but it will be obvious that our invention would not be departed from should a projection from the said plate or enter a notch suitably cut in a part of the cutter-blade.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a sewing-machine, a chambered work-' support, a plate independent thereof and sustained thereby and provided with an aliningnotch at its inner side, a cutter-blade independent of the walls of said chamber and provided with an angular portion constituting a foot, the cutting portion of said blade entering the alining-notch to thereby properly position the blade with respect to the plate, means for securing the foot within the worksupport and a trim mer-blade cooperating with the cutter-blade.

2. In a sewing machine, the chambered work-support, a plate independent thereof and notched at its inner side and sustained by said work-support, a cutter-blade having an angular portion constituting a foot located in said chamber, the cutting portion of the blade entering the notch on the inner side of the plate, means to secure the angular portion of the cutter-blade on the upper surface of the lower wall of said chamber, and a trimmer-blade cooperating with said cutter-blade.

3. In a sewing-machine, a work-support, a plate sustained thereby, said Work-support presenting a chamber at the inner side of said plate, and having a lower wall combined with a shield centrally depressed and crossing said chamber to provide a receptacle for waste, and means to sustain said shield in operative position at a point below the surface of said plate.

4. In a sewing-machine, aslotted plate, a feeding device, a presser-foot resting on the IIO material on said plate, and a work-support having a chamber in its upper side next the inner side of said plate; combined with a cutter-blade located in the end of said chamber next said plate, said cutter-blade having an angular foot portion by which to secure it in operative position within the chamber,a block in the lower part of said chamber to which the angular foot portion of the cutter-blade is adj ustably secured and a cooperating movable trimmer-blade the end of which enters said chamber.

5. In a sewing-machine, a slotted plate, a feeding device, a presser-foot resting on the material on said plate, and a work-support having a chamber at its upper side next the 

